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<pre><span class="sourceLineNo">001</span>/* ===========================================================<a name="line.1"></a>
<span class="sourceLineNo">002</span> * JFreeChart : a free chart library for the Java(tm) platform<a name="line.2"></a>
<span class="sourceLineNo">003</span> * ===========================================================<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.<a name="line.5"></a>
<span class="sourceLineNo">006</span> *<a name="line.6"></a>
<span class="sourceLineNo">007</span> * Project Info:  http://www.jfree.org/jfreechart/index.html<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> * This library is free software; you can redistribute it and/or modify it<a name="line.9"></a>
<span class="sourceLineNo">010</span> * under the terms of the GNU Lesser General Public License as published by<a name="line.10"></a>
<span class="sourceLineNo">011</span> * the Free Software Foundation; either version 2.1 of the License, or<a name="line.11"></a>
<span class="sourceLineNo">012</span> * (at your option) any later version.<a name="line.12"></a>
<span class="sourceLineNo">013</span> *<a name="line.13"></a>
<span class="sourceLineNo">014</span> * This library is distributed in the hope that it will be useful, but<a name="line.14"></a>
<span class="sourceLineNo">015</span> * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY<a name="line.15"></a>
<span class="sourceLineNo">016</span> * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public<a name="line.16"></a>
<span class="sourceLineNo">017</span> * License for more details.<a name="line.17"></a>
<span class="sourceLineNo">018</span> *<a name="line.18"></a>
<span class="sourceLineNo">019</span> * You should have received a copy of the GNU Lesser General Public<a name="line.19"></a>
<span class="sourceLineNo">020</span> * License along with this library; if not, write to the Free Software<a name="line.20"></a>
<span class="sourceLineNo">021</span> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,<a name="line.21"></a>
<span class="sourceLineNo">022</span> * USA.<a name="line.22"></a>
<span class="sourceLineNo">023</span> *<a name="line.23"></a>
<span class="sourceLineNo">024</span> * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. <a name="line.24"></a>
<span class="sourceLineNo">025</span> * Other names may be trademarks of their respective owners.]<a name="line.25"></a>
<span class="sourceLineNo">026</span> *<a name="line.26"></a>
<span class="sourceLineNo">027</span> * -------------<a name="line.27"></a>
<span class="sourceLineNo">028</span> * DialPlot.java<a name="line.28"></a>
<span class="sourceLineNo">029</span> * -------------<a name="line.29"></a>
<span class="sourceLineNo">030</span> * (C) Copyright 2006-2008, by Object Refinery Limited.<a name="line.30"></a>
<span class="sourceLineNo">031</span> *<a name="line.31"></a>
<span class="sourceLineNo">032</span> * Original Author:  David Gilbert (for Object Refinery Limited);<a name="line.32"></a>
<span class="sourceLineNo">033</span> * Contributor(s):   -;<a name="line.33"></a>
<span class="sourceLineNo">034</span> *<a name="line.34"></a>
<span class="sourceLineNo">035</span> * Changes<a name="line.35"></a>
<span class="sourceLineNo">036</span> * -------<a name="line.36"></a>
<span class="sourceLineNo">037</span> * 03-Nov-2006 : Version 1 (DG);<a name="line.37"></a>
<span class="sourceLineNo">038</span> * 08-Mar-2007 : Fix in hashCode() (DG);<a name="line.38"></a>
<span class="sourceLineNo">039</span> * 17-Oct-2007 : Fixed listener registration/deregistration bugs (DG);<a name="line.39"></a>
<span class="sourceLineNo">040</span> * 24-Oct-2007 : Maintain pointers in their own list, so they can be<a name="line.40"></a>
<span class="sourceLineNo">041</span> *               drawn after other layers (DG);<a name="line.41"></a>
<span class="sourceLineNo">042</span> * 15-Feb-2007 : Fixed clipping bug (1873160) (DG);<a name="line.42"></a>
<span class="sourceLineNo">043</span> *<a name="line.43"></a>
<span class="sourceLineNo">044</span> */<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>package org.jfree.chart.plot.dial;<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span>import java.awt.Graphics2D;<a name="line.48"></a>
<span class="sourceLineNo">049</span>import java.awt.Shape;<a name="line.49"></a>
<span class="sourceLineNo">050</span>import java.awt.geom.Point2D;<a name="line.50"></a>
<span class="sourceLineNo">051</span>import java.awt.geom.Rectangle2D;<a name="line.51"></a>
<span class="sourceLineNo">052</span>import java.io.IOException;<a name="line.52"></a>
<span class="sourceLineNo">053</span>import java.io.ObjectInputStream;<a name="line.53"></a>
<span class="sourceLineNo">054</span>import java.io.ObjectOutputStream;<a name="line.54"></a>
<span class="sourceLineNo">055</span>import java.util.Iterator;<a name="line.55"></a>
<span class="sourceLineNo">056</span>import java.util.List;<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span>import org.jfree.chart.JFreeChart;<a name="line.58"></a>
<span class="sourceLineNo">059</span>import org.jfree.chart.event.PlotChangeEvent;<a name="line.59"></a>
<span class="sourceLineNo">060</span>import org.jfree.chart.plot.Plot;<a name="line.60"></a>
<span class="sourceLineNo">061</span>import org.jfree.chart.plot.PlotRenderingInfo;<a name="line.61"></a>
<span class="sourceLineNo">062</span>import org.jfree.chart.plot.PlotState;<a name="line.62"></a>
<span class="sourceLineNo">063</span>import org.jfree.data.general.DatasetChangeEvent;<a name="line.63"></a>
<span class="sourceLineNo">064</span>import org.jfree.data.general.ValueDataset;<a name="line.64"></a>
<span class="sourceLineNo">065</span>import org.jfree.util.ObjectList;<a name="line.65"></a>
<span class="sourceLineNo">066</span>import org.jfree.util.ObjectUtilities;<a name="line.66"></a>
<span class="sourceLineNo">067</span><a name="line.67"></a>
<span class="sourceLineNo">068</span>/**<a name="line.68"></a>
<span class="sourceLineNo">069</span> * A dial plot composed of user-definable layers.<a name="line.69"></a>
<span class="sourceLineNo">070</span> * The example shown here is generated by the &lt;code&gt;DialDemo2.java&lt;/code&gt;<a name="line.70"></a>
<span class="sourceLineNo">071</span> * program included in the JFreeChart Demo Collection:<a name="line.71"></a>
<span class="sourceLineNo">072</span> * &lt;br&gt;&lt;br&gt;<a name="line.72"></a>
<span class="sourceLineNo">073</span> * &lt;img src="../../../../../images/DialPlotSample.png"<a name="line.73"></a>
<span class="sourceLineNo">074</span> * alt="DialPlotSample.png" /&gt;<a name="line.74"></a>
<span class="sourceLineNo">075</span> *<a name="line.75"></a>
<span class="sourceLineNo">076</span> * @since 1.0.7<a name="line.76"></a>
<span class="sourceLineNo">077</span> */<a name="line.77"></a>
<span class="sourceLineNo">078</span>public class DialPlot extends Plot implements DialLayerChangeListener {<a name="line.78"></a>
<span class="sourceLineNo">079</span><a name="line.79"></a>
<span class="sourceLineNo">080</span>    /**<a name="line.80"></a>
<span class="sourceLineNo">081</span>     * The background layer (optional).<a name="line.81"></a>
<span class="sourceLineNo">082</span>     */<a name="line.82"></a>
<span class="sourceLineNo">083</span>    private DialLayer background;<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span>    /**<a name="line.85"></a>
<span class="sourceLineNo">086</span>     * The needle cap (optional).<a name="line.86"></a>
<span class="sourceLineNo">087</span>     */<a name="line.87"></a>
<span class="sourceLineNo">088</span>    private DialLayer cap;<a name="line.88"></a>
<span class="sourceLineNo">089</span><a name="line.89"></a>
<span class="sourceLineNo">090</span>    /**<a name="line.90"></a>
<span class="sourceLineNo">091</span>     * The dial frame.<a name="line.91"></a>
<span class="sourceLineNo">092</span>     */<a name="line.92"></a>
<span class="sourceLineNo">093</span>    private DialFrame dialFrame;<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>
<span class="sourceLineNo">095</span>    /**<a name="line.95"></a>
<span class="sourceLineNo">096</span>     * The dataset(s) for the dial plot.<a name="line.96"></a>
<span class="sourceLineNo">097</span>     */<a name="line.97"></a>
<span class="sourceLineNo">098</span>    private ObjectList datasets;<a name="line.98"></a>
<span class="sourceLineNo">099</span><a name="line.99"></a>
<span class="sourceLineNo">100</span>    /**<a name="line.100"></a>
<span class="sourceLineNo">101</span>     * The scale(s) for the dial plot.<a name="line.101"></a>
<span class="sourceLineNo">102</span>     */<a name="line.102"></a>
<span class="sourceLineNo">103</span>    private ObjectList scales;<a name="line.103"></a>
<span class="sourceLineNo">104</span><a name="line.104"></a>
<span class="sourceLineNo">105</span>    /** Storage for keys that map datasets to scales. */<a name="line.105"></a>
<span class="sourceLineNo">106</span>    private ObjectList datasetToScaleMap;<a name="line.106"></a>
<span class="sourceLineNo">107</span><a name="line.107"></a>
<span class="sourceLineNo">108</span>    /**<a name="line.108"></a>
<span class="sourceLineNo">109</span>     * The drawing layers for the dial plot.<a name="line.109"></a>
<span class="sourceLineNo">110</span>     */<a name="line.110"></a>
<span class="sourceLineNo">111</span>    private List layers;<a name="line.111"></a>
<span class="sourceLineNo">112</span><a name="line.112"></a>
<span class="sourceLineNo">113</span>    /**<a name="line.113"></a>
<span class="sourceLineNo">114</span>     * The pointer(s) for the dial.<a name="line.114"></a>
<span class="sourceLineNo">115</span>     */<a name="line.115"></a>
<span class="sourceLineNo">116</span>    private List pointers;<a name="line.116"></a>
<span class="sourceLineNo">117</span><a name="line.117"></a>
<span class="sourceLineNo">118</span>    /**<a name="line.118"></a>
<span class="sourceLineNo">119</span>     * The x-coordinate for the view window.<a name="line.119"></a>
<span class="sourceLineNo">120</span>     */<a name="line.120"></a>
<span class="sourceLineNo">121</span>    private double viewX;<a name="line.121"></a>
<span class="sourceLineNo">122</span><a name="line.122"></a>
<span class="sourceLineNo">123</span>    /**<a name="line.123"></a>
<span class="sourceLineNo">124</span>     * The y-coordinate for the view window.<a name="line.124"></a>
<span class="sourceLineNo">125</span>     */<a name="line.125"></a>
<span class="sourceLineNo">126</span>    private double viewY;<a name="line.126"></a>
<span class="sourceLineNo">127</span><a name="line.127"></a>
<span class="sourceLineNo">128</span>    /**<a name="line.128"></a>
<span class="sourceLineNo">129</span>     * The width of the view window, expressed as a percentage.<a name="line.129"></a>
<span class="sourceLineNo">130</span>     */<a name="line.130"></a>
<span class="sourceLineNo">131</span>    private double viewW;<a name="line.131"></a>
<span class="sourceLineNo">132</span><a name="line.132"></a>
<span class="sourceLineNo">133</span>    /**<a name="line.133"></a>
<span class="sourceLineNo">134</span>     * The height of the view window, expressed as a percentage.<a name="line.134"></a>
<span class="sourceLineNo">135</span>     */<a name="line.135"></a>
<span class="sourceLineNo">136</span>    private double viewH;<a name="line.136"></a>
<span class="sourceLineNo">137</span><a name="line.137"></a>
<span class="sourceLineNo">138</span>    /**<a name="line.138"></a>
<span class="sourceLineNo">139</span>     * Creates a new instance of &lt;code&gt;DialPlot&lt;/code&gt;.<a name="line.139"></a>
<span class="sourceLineNo">140</span>     */<a name="line.140"></a>
<span class="sourceLineNo">141</span>    public DialPlot() {<a name="line.141"></a>
<span class="sourceLineNo">142</span>        this(null);<a name="line.142"></a>
<span class="sourceLineNo">143</span>    }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span>    /**<a name="line.145"></a>
<span class="sourceLineNo">146</span>     * Creates a new instance of &lt;code&gt;DialPlot&lt;/code&gt;.<a name="line.146"></a>
<span class="sourceLineNo">147</span>     *<a name="line.147"></a>
<span class="sourceLineNo">148</span>     * @param dataset  the dataset (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.148"></a>
<span class="sourceLineNo">149</span>     */<a name="line.149"></a>
<span class="sourceLineNo">150</span>    public DialPlot(ValueDataset dataset) {<a name="line.150"></a>
<span class="sourceLineNo">151</span>        this.background = null;<a name="line.151"></a>
<span class="sourceLineNo">152</span>        this.cap = null;<a name="line.152"></a>
<span class="sourceLineNo">153</span>        this.dialFrame = new ArcDialFrame();<a name="line.153"></a>
<span class="sourceLineNo">154</span>        this.datasets = new ObjectList();<a name="line.154"></a>
<span class="sourceLineNo">155</span>        if (dataset != null) {<a name="line.155"></a>
<span class="sourceLineNo">156</span>            setDataset(dataset);<a name="line.156"></a>
<span class="sourceLineNo">157</span>        }<a name="line.157"></a>
<span class="sourceLineNo">158</span>        this.scales = new ObjectList();<a name="line.158"></a>
<span class="sourceLineNo">159</span>        this.datasetToScaleMap = new ObjectList();<a name="line.159"></a>
<span class="sourceLineNo">160</span>        this.layers = new java.util.ArrayList();<a name="line.160"></a>
<span class="sourceLineNo">161</span>        this.pointers = new java.util.ArrayList();<a name="line.161"></a>
<span class="sourceLineNo">162</span>        this.viewX = 0.0;<a name="line.162"></a>
<span class="sourceLineNo">163</span>        this.viewY = 0.0;<a name="line.163"></a>
<span class="sourceLineNo">164</span>        this.viewW = 1.0;<a name="line.164"></a>
<span class="sourceLineNo">165</span>        this.viewH = 1.0;<a name="line.165"></a>
<span class="sourceLineNo">166</span>    }<a name="line.166"></a>
<span class="sourceLineNo">167</span><a name="line.167"></a>
<span class="sourceLineNo">168</span>    /**<a name="line.168"></a>
<span class="sourceLineNo">169</span>     * Returns the background.<a name="line.169"></a>
<span class="sourceLineNo">170</span>     *<a name="line.170"></a>
<span class="sourceLineNo">171</span>     * @return The background (possibly &lt;code&gt;null&lt;/code&gt;).<a name="line.171"></a>
<span class="sourceLineNo">172</span>     *<a name="line.172"></a>
<span class="sourceLineNo">173</span>     * @see #setBackground(DialLayer)<a name="line.173"></a>
<span class="sourceLineNo">174</span>     */<a name="line.174"></a>
<span class="sourceLineNo">175</span>    public DialLayer getBackground() {<a name="line.175"></a>
<span class="sourceLineNo">176</span>        return this.background;<a name="line.176"></a>
<span class="sourceLineNo">177</span>    }<a name="line.177"></a>
<span class="sourceLineNo">178</span><a name="line.178"></a>
<span class="sourceLineNo">179</span>    /**<a name="line.179"></a>
<span class="sourceLineNo">180</span>     * Sets the background layer and sends a {@link PlotChangeEvent} to all<a name="line.180"></a>
<span class="sourceLineNo">181</span>     * registered listeners.<a name="line.181"></a>
<span class="sourceLineNo">182</span>     *<a name="line.182"></a>
<span class="sourceLineNo">183</span>     * @param background  the background layer (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.183"></a>
<span class="sourceLineNo">184</span>     *<a name="line.184"></a>
<span class="sourceLineNo">185</span>     * @see #getBackground()<a name="line.185"></a>
<span class="sourceLineNo">186</span>     */<a name="line.186"></a>
<span class="sourceLineNo">187</span>    public void setBackground(DialLayer background) {<a name="line.187"></a>
<span class="sourceLineNo">188</span>        if (this.background != null) {<a name="line.188"></a>
<span class="sourceLineNo">189</span>            this.background.removeChangeListener(this);<a name="line.189"></a>
<span class="sourceLineNo">190</span>        }<a name="line.190"></a>
<span class="sourceLineNo">191</span>        this.background = background;<a name="line.191"></a>
<span class="sourceLineNo">192</span>        if (background != null) {<a name="line.192"></a>
<span class="sourceLineNo">193</span>            background.addChangeListener(this);<a name="line.193"></a>
<span class="sourceLineNo">194</span>        }<a name="line.194"></a>
<span class="sourceLineNo">195</span>        fireChangeEvent();<a name="line.195"></a>
<span class="sourceLineNo">196</span>    }<a name="line.196"></a>
<span class="sourceLineNo">197</span><a name="line.197"></a>
<span class="sourceLineNo">198</span>    /**<a name="line.198"></a>
<span class="sourceLineNo">199</span>     * Returns the cap.<a name="line.199"></a>
<span class="sourceLineNo">200</span>     *<a name="line.200"></a>
<span class="sourceLineNo">201</span>     * @return The cap (possibly &lt;code&gt;null&lt;/code&gt;).<a name="line.201"></a>
<span class="sourceLineNo">202</span>     *<a name="line.202"></a>
<span class="sourceLineNo">203</span>     * @see #setCap(DialLayer)<a name="line.203"></a>
<span class="sourceLineNo">204</span>     */<a name="line.204"></a>
<span class="sourceLineNo">205</span>    public DialLayer getCap() {<a name="line.205"></a>
<span class="sourceLineNo">206</span>        return this.cap;<a name="line.206"></a>
<span class="sourceLineNo">207</span>    }<a name="line.207"></a>
<span class="sourceLineNo">208</span><a name="line.208"></a>
<span class="sourceLineNo">209</span>    /**<a name="line.209"></a>
<span class="sourceLineNo">210</span>     * Sets the cap and sends a {@link PlotChangeEvent} to all registered<a name="line.210"></a>
<span class="sourceLineNo">211</span>     * listeners.<a name="line.211"></a>
<span class="sourceLineNo">212</span>     *<a name="line.212"></a>
<span class="sourceLineNo">213</span>     * @param cap  the cap (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.213"></a>
<span class="sourceLineNo">214</span>     *<a name="line.214"></a>
<span class="sourceLineNo">215</span>     * @see #getCap()<a name="line.215"></a>
<span class="sourceLineNo">216</span>     */<a name="line.216"></a>
<span class="sourceLineNo">217</span>    public void setCap(DialLayer cap) {<a name="line.217"></a>
<span class="sourceLineNo">218</span>        if (this.cap != null) {<a name="line.218"></a>
<span class="sourceLineNo">219</span>            this.cap.removeChangeListener(this);<a name="line.219"></a>
<span class="sourceLineNo">220</span>        }<a name="line.220"></a>
<span class="sourceLineNo">221</span>        this.cap = cap;<a name="line.221"></a>
<span class="sourceLineNo">222</span>        if (cap != null) {<a name="line.222"></a>
<span class="sourceLineNo">223</span>            cap.addChangeListener(this);<a name="line.223"></a>
<span class="sourceLineNo">224</span>        }<a name="line.224"></a>
<span class="sourceLineNo">225</span>        fireChangeEvent();<a name="line.225"></a>
<span class="sourceLineNo">226</span>    }<a name="line.226"></a>
<span class="sourceLineNo">227</span><a name="line.227"></a>
<span class="sourceLineNo">228</span>    /**<a name="line.228"></a>
<span class="sourceLineNo">229</span>     * Returns the dial's frame.<a name="line.229"></a>
<span class="sourceLineNo">230</span>     *<a name="line.230"></a>
<span class="sourceLineNo">231</span>     * @return The dial's frame (never &lt;code&gt;null&lt;/code&gt;).<a name="line.231"></a>
<span class="sourceLineNo">232</span>     *<a name="line.232"></a>
<span class="sourceLineNo">233</span>     * @see #setDialFrame(DialFrame)<a name="line.233"></a>
<span class="sourceLineNo">234</span>     */<a name="line.234"></a>
<span class="sourceLineNo">235</span>    public DialFrame getDialFrame() {<a name="line.235"></a>
<span class="sourceLineNo">236</span>        return this.dialFrame;<a name="line.236"></a>
<span class="sourceLineNo">237</span>    }<a name="line.237"></a>
<span class="sourceLineNo">238</span><a name="line.238"></a>
<span class="sourceLineNo">239</span>    /**<a name="line.239"></a>
<span class="sourceLineNo">240</span>     * Sets the dial's frame and sends a {@link PlotChangeEvent} to all<a name="line.240"></a>
<span class="sourceLineNo">241</span>     * registered listeners.<a name="line.241"></a>
<span class="sourceLineNo">242</span>     *<a name="line.242"></a>
<span class="sourceLineNo">243</span>     * @param frame  the frame (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.243"></a>
<span class="sourceLineNo">244</span>     *<a name="line.244"></a>
<span class="sourceLineNo">245</span>     * @see #getDialFrame()<a name="line.245"></a>
<span class="sourceLineNo">246</span>     */<a name="line.246"></a>
<span class="sourceLineNo">247</span>    public void setDialFrame(DialFrame frame) {<a name="line.247"></a>
<span class="sourceLineNo">248</span>        if (frame == null) {<a name="line.248"></a>
<span class="sourceLineNo">249</span>            throw new IllegalArgumentException("Null 'frame' argument.");<a name="line.249"></a>
<span class="sourceLineNo">250</span>        }<a name="line.250"></a>
<span class="sourceLineNo">251</span>        this.dialFrame.removeChangeListener(this);<a name="line.251"></a>
<span class="sourceLineNo">252</span>        this.dialFrame = frame;<a name="line.252"></a>
<span class="sourceLineNo">253</span>        frame.addChangeListener(this);<a name="line.253"></a>
<span class="sourceLineNo">254</span>        fireChangeEvent();<a name="line.254"></a>
<span class="sourceLineNo">255</span>    }<a name="line.255"></a>
<span class="sourceLineNo">256</span><a name="line.256"></a>
<span class="sourceLineNo">257</span>    /**<a name="line.257"></a>
<span class="sourceLineNo">258</span>     * Returns the x-coordinate of the viewing rectangle.  This is specified<a name="line.258"></a>
<span class="sourceLineNo">259</span>     * in the range 0.0 to 1.0, relative to the dial's framing rectangle.<a name="line.259"></a>
<span class="sourceLineNo">260</span>     *<a name="line.260"></a>
<span class="sourceLineNo">261</span>     * @return The x-coordinate of the viewing rectangle.<a name="line.261"></a>
<span class="sourceLineNo">262</span>     *<a name="line.262"></a>
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<span class="sourceLineNo">294</span>     * Returns the height of the viewing rectangle.  This is specified<a name="line.294"></a>
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<span class="sourceLineNo">372</span>     * Removes the specified layer and sends a {@link PlotChangeEvent} to all<a name="line.372"></a>
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<span class="sourceLineNo">374</span>     *<a name="line.374"></a>
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<span class="sourceLineNo">385</span>     *<a name="line.385"></a>
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<span class="sourceLineNo">412</span>     * Removes the pointer at the specified index and sends a<a name="line.412"></a>
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<span class="sourceLineNo">427</span>     * Removes the specified pointer and sends a {@link PlotChangeEvent} to all<a name="line.427"></a>
<span class="sourceLineNo">428</span>     * registered listeners.<a name="line.428"></a>
<span class="sourceLineNo">429</span>     *<a name="line.429"></a>
<span class="sourceLineNo">430</span>     * @param pointer  the pointer (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.430"></a>
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<span class="sourceLineNo">438</span>     * Returns the dial pointer that is associated with the specified<a name="line.438"></a>
<span class="sourceLineNo">439</span>     * dataset, or &lt;code&gt;null&lt;/code&gt;.<a name="line.439"></a>
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<span class="sourceLineNo">441</span>     * @param datasetIndex  the dataset index.<a name="line.441"></a>
<span class="sourceLineNo">442</span>     *<a name="line.442"></a>
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<span class="sourceLineNo">458</span>     * Returns the primary dataset for the plot.<a name="line.458"></a>
<span class="sourceLineNo">459</span>     *<a name="line.459"></a>
<span class="sourceLineNo">460</span>     * @return The primary dataset (possibly &lt;code&gt;null&lt;/code&gt;).<a name="line.460"></a>
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<span class="sourceLineNo">525</span>     * Draws the plot.  This method is usually called by the {@link JFreeChart}<a name="line.525"></a>
<span class="sourceLineNo">526</span>     * instance that manages the plot.<a name="line.526"></a>
<span class="sourceLineNo">527</span>     *<a name="line.527"></a>
<span class="sourceLineNo">528</span>     * @param g2  the graphics target.<a name="line.528"></a>
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<span class="sourceLineNo">531</span>     *     mouse clicked on, &lt;code&gt;null&lt;/code&gt; is permitted).<a name="line.531"></a>
<span class="sourceLineNo">532</span>     * @param parentState  the state for the parent plot (if any).<a name="line.532"></a>
<span class="sourceLineNo">533</span>     * @param info  used to collect plot rendering info (&lt;code&gt;null&lt;/code&gt;<a name="line.533"></a>
<span class="sourceLineNo">534</span>     *     permitted).<a name="line.534"></a>
<span class="sourceLineNo">535</span>     */<a name="line.535"></a>
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<span class="sourceLineNo">543</span>        Rectangle2D frame = viewToFrame(area);<a name="line.543"></a>
<span class="sourceLineNo">544</span><a name="line.544"></a>
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<span class="sourceLineNo">550</span>                this.background.draw(g2, this, frame, area);<a name="line.550"></a>
<span class="sourceLineNo">551</span>                g2.setClip(savedClip);<a name="line.551"></a>
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<span class="sourceLineNo">564</span>                    g2.clip(this.dialFrame.getWindow(frame));<a name="line.564"></a>
<span class="sourceLineNo">565</span>                    current.draw(g2, this, frame, area);<a name="line.565"></a>
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<span class="sourceLineNo">590</span><a name="line.590"></a>
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<span class="sourceLineNo">617</span>     * @return The frame rectangle.<a name="line.617"></a>
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<span class="sourceLineNo">627</span>    /**<a name="line.627"></a>
<span class="sourceLineNo">628</span>     * Returns the value from the specified dataset.<a name="line.628"></a>
<span class="sourceLineNo">629</span>     *<a name="line.629"></a>
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<span class="sourceLineNo">631</span>     *<a name="line.631"></a>
<span class="sourceLineNo">632</span>     * @return The data value.<a name="line.632"></a>
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<span class="sourceLineNo">648</span>     * all registered listeners.<a name="line.648"></a>
<span class="sourceLineNo">649</span>     *<a name="line.649"></a>
<span class="sourceLineNo">650</span>     * @param index  the scale index.<a name="line.650"></a>
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<span class="sourceLineNo">668</span>     * Returns the scale at the given index.<a name="line.668"></a>
<span class="sourceLineNo">669</span>     *<a name="line.669"></a>
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<span class="sourceLineNo">671</span>     *<a name="line.671"></a>
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<span class="sourceLineNo">682</span>    /**<a name="line.682"></a>
<span class="sourceLineNo">683</span>     * Maps a dataset to a particular scale.<a name="line.683"></a>
<span class="sourceLineNo">684</span>     *<a name="line.684"></a>
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<span class="sourceLineNo">693</span>    /**<a name="line.693"></a>
<span class="sourceLineNo">694</span>     * Returns the dial scale for a specific dataset.<a name="line.694"></a>
<span class="sourceLineNo">695</span>     *<a name="line.695"></a>
<span class="sourceLineNo">696</span>     * @param datasetIndex  the dataset index.<a name="line.696"></a>
<span class="sourceLineNo">697</span>     *<a name="line.697"></a>
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<span class="sourceLineNo">711</span>     *<a name="line.711"></a>
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<span class="sourceLineNo">724</span>        double y = rect.getCenterY();<a name="line.724"></a>
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